45.1 hormones and signaling molecules Flashcards

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1
Q

hormone

A

molecule secreted into extracellular fluid to send messages throughout body

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2
Q

nervous system

A

neurons transmit signals everywhere

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3
Q

endocrine glands vs

exocrine gands

A

endo=secrete hormones into surrounding fluid

exo=secrete substances onto body surfaces and body cavities

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4
Q

local regulators

A

secreted molecules that act short distance

-reach target only by diffusion

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5
Q

paracrine

A

target is near cell

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6
Q

autocrine

A

secreted molecules act on secreting cell itself

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7
Q

neurotransmitters

A

chemicals that diffuse short distances to target cell receptors

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8
Q

neuroendocrine signaling

A

neurosecretory cells (brain) secrete molecules that diffuse from nerve cell endings into bloodstream to reach target cells

  • -neurohormones
    ex. ADH for kidneys for water balance
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9
Q

pheromones

A

chemicals released into the external environment

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